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. 2008 Aug;132(2):223–238. doi: 10.1085/jgp.200809986

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© 2008 Khan et al.

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Figure 5. — Analysis of chord conductances. (A–D) Dependence of chord conductance on Ca²⁺_o or Ba²⁺_o, shown for voltages in 40-mV increments. Positive voltages (A and C) and negative voltages (B and D) are shown for Ca²⁺_o (A and B) and Ba²⁺_o (C and D). Smooth curves are described in Materials and methods. (E and F) Analysis of chord conductances as the sum of Na⁺ and Ca²⁺/Ba²⁺ conductances. (E) Maximal conductances; (F) apparent K_d values for permeation (activation of G_{Ca or Ba}) and block (inhibition of G_Na).